US2208950A

US2208950A - Meter

Info

Publication number: US2208950A
Application number: US153956A
Authority: US
Inventors: Jr Ross Eugene Risser
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-07-16
Filing date: 1937-07-16
Publication date: 1940-07-23
Anticipated expiration: 1957-07-23

Description

Jul -z Y 3, 1949- R. E. RlssER, JR 2,208,950

METER original Filed July` le, lssv s' sheets-sheet l July 23, 1940. r-e. E.' RlssER, JR

METER Original Filed July 16, 195:"1-4 3 Sheets-Sheet 2 July 23, l940 R. E. RissER, JR 2,208,950

' METER Original Filed July 16, 1937 3 Sheets-Sheet 3 R /9 o zz y 7*/ Z5 50 Z0 Z7 /3 Z3* 57 /gn C Z4 52 6 l Z5 o S 6/ l .l 7 /f l '67 J /4 65 7/ /Z 72667/ 7369 74 57 60 67/ 59 /0 6 64 53 fa Patented July 23, 1940 Application Juiy 16, 1937, S-erialNo. 153,956 Renewed January 4,1940

3y Claims.

This'invention relates to improvements in a meter of the positive displacement type such as adapted for use in dispensing apparatus for accurate measurement of a volume of liquid delivered as required, and forother uses where the volume of liquid flow through a pipe under pressure, is to be determined with precision.

One object of the invention `is to provide a liquid measuring appliance operated by pressure of the liquid owing therethrough, so constituted that operation of the appliance andthe flow of liquid therethrough by` which it is actuated, are uniformly concurrent throughout thecycles of operation, irrespective of variations in the operating speed or in the pressureofthe fluid.

Another object is -to` so construct and arrange the various parts of the apparatus as to occasion but negligible wear and frictional resistance that ordinarily occurs because of corrosion thereof, and intermittent or hard usage.`

A further object is to provide means conveniently accessible for adjustably increasing or decreasing the stroke of the plungers to thereby regulate or vary the displacement of liquid as it passes through the meter.

A further object is to provide a crankshaft having means whereby the throw of the shaft may be readily adjusted and locked in adjusted position.

A further` object is to provide each of the pistons ofthe meter with acup leather, which may be `readily removed from the piston by removing the cylinder head.

Other objects and advantages of the invention will become .apparent as the nature of the same is more fully understood from the following description and accompanying drawings wherein is set forth what is now considered to be a preferred embodiment. It should be understood, however, that this particular embodiment of the invention is chosen principally for the purpose of exemplication, and that variations therefrom in details of construction or arrangement of parts may accordingly be effected and yet remain within the spirit and scope of the invention as the same `is set forth in the appended claims. i

In the drawings:

Fig. `lrillustrates a cross-sectional view taken substantially in the plane of line I--I of Fig. 2.

Fig. 2 illustrates a sectional View `taken substantially in the plane of' line 2,-2 o-f Fig. 1.

Fig. 3 illustrates a fragmental sectional view taken substantially in the plane of line 3-3 of Fig. 2. l

Fig. `i illustrates a sectional view taken substantially in the plane of line 4 4 `of Fig, 1.

5 illustrates a fragmental sectional view taken substantially in the plane of line 5 5 of Fig. 1. i

Figo illustrates a modified form of crankshaft.

Fig. 7 illustrates a Acoupling device between the crankshaft and a valve.

In the preferred embodiment of the invention, the meter includes a crank case I0 having three equally spaced and radially related cylinders II.

It will be understood, however, that ifprefer'red,

a greater number of cylinders may be provided. The crank case is provided with a port or passageway I2 leading to each of the cylinder bores. Each cylinder is provided with a suitable cylinder head I3 mounted thereon as by suitable screw means I4, and if preferred, a gasket I5 maybe positioned between the cylinder and the cylinder head I3. The crank case is provided with bearing flanges I6 and I'I passing through the crank case at opposite sides thereof in any preferred manner. Each of the bearing flanges includes a crankshaft bearing i3, and these flanges `are provided with openings so that the duid under treatment may pass through the crank case. Journalled in the bearings I8 is a crankshaft I9, which is of a particular construction to provide an adjustable throw for regulating the quantity of fluid passed through the meter for each revolution of the shaft. 'Ihe crankshaft includesfa main shaft portion 2l) carrying at its inner end a crank arm 2l. A crank pin 22 is journaled inthe outer end of the crank arm 2I and is provided with an eccentric bearing surface 23. In the form of crankshaft Ibearing shown, it is preferable to provide a crank yarm 24-spaced from the crank arm 2I in the freeend of which the opposite end of the crank pin 22may likewise be journalled. The crank arm 24 is mounted upon a short shaft 25 supported in bearing I8 of the lower bearing flange I'I. It will be understood that the

shafts

20 and 25 are in axial alignment. In order to control the position of the `eccentric bearing surface 23 of the crank pin 22, a gear 26 is fastened to the crank pin 22 adjacent the inner side of the crank arm 2 I, and a corresponding meshing gear 21 is carried upon the end of, an adjusting shaft 28, which `extends through the main shaft 2U. By this arrangement it will be readily appreciated that an angular rotation of the adjusting shaft 28 with relation to the main shaft 2|] will", through the gears 2l and 26, rotate the crank pin 22 thereby adjusting the eccen- ,tricfbearing surface 23 to increase or decrease main universal joint 33.

the effective throw of the crankshaft. Means are provided for adjusting the throw of the crankshaft through the adjusting shaft 28, and for looking the adjusting shaft to the main shaft 29 when the adjustment has been reached. This means will be described later. As may be observed in Fig. 1, an inlet cover 36 is securely fastened upon the upper surface of the crank case by screw means not shown. The cover is provided with a liquid inlet passage 3| through which the liquid entering the meter passes. EX- cepting for the inlet passage 3|, the cover 30 completely seals the upper portion of the crank case. The cover is provided with a pocket 32 in which the adjusting and locking means: for the crankshaft is mounted. As will be observed in Fig. 1, the crankshaft 20 is provided with a universal coupling 33 of the step type, whereby the coupling can be connected in one only angular relation to the shaft. The coupling carries a tubular shaftl 34 which extends through a bearing 35 formed in the cover 30 between the pocket 32 and the inside cavity of the cover. The tubular shaft 34 carries at its end a locking disc 36 (Figs, 1 and 5). Referring again to Fig. l, it will be observed that the adjusting rod 28 is provided with a universal joint 31 of the same type as the universal joint 33 for the main shaft, but is of smaller size and is mounted within the The small universal joint 31 connects the adjusting shaft 28 to a disc shaft 38, which shaft carries at its upper end a locking disc 39. Referring to Fig. 5, the locking discs 36 and 39 are each provided with a series of concentrically arranged

locking holes

40 and 4|. In this figure it will be noted that there are nine equally spaced locking holes provided in the disc 39, while in the locking disc 36 there are ten equally spaced locking holes. Due to this spacing of the locking holes a very fine and accurate setting of the adjusting means for thereby determining the throw of the crankshaft, is obtained. rIhe two discs may be locked together by placing a locking pin 42 (Figs.v 1 and 5) through the

holes

46 and 4|, which are in axial alignment for the particular adjustment of the crankshaft. As will be appreciated, this mechanism provides a simple positive accuratev means for adjusting thethrow of the crankshaft, which cannot be easily damaged during the adjustment of the crankshaft throw.

To transmit the motion of the crankshaft to` a suitable recording mechanism (not shown) the main shaft 2|] is provided with a driving gear 43 arranged to drive gear 44 carried by the short shaft 45 journalled to the bearing flange I6 and having its axis parallel to the axis of the crankshaft. The upper end ofthisfshort shaft is provided with a universal joint 46 by' means of which the meter or register driving shaft 41 is detachably connected. The meter shaft 41 is journalled in and extends through the cover 36, which is provided with a suitable form of stuffing-box 48 for sealing the passage of the shaft through the cover against leakage. A spring means 49 may be provided around shaft 41 between the adjacent portion of the cover, and the upper end of the universal 46, to resiliently urge the upper portionl of the universal joint into driving'relation with its corresponding portion carried by-the short shaft 45. It will be understood that a register or meter of suitable form may be connected'to and driven from the end of the shaft 41 which projects through the casing 30.`

The

universal joints

33, 31 and 46 are provided so lthat the cover 3U may be readily removed to inspect or clean the interior of the meter without the necessity of disassembling the crankshaft and connected parts from the crank case. In the meter shown, it is only necessary to disconnect the supply pipe to the portion 3| of the cover, and remove the cover screws and thereafter lift the cover clear of the crank case; and due to the particular form of

universal joints

33 and 31 when the cover is reassembled upon the crank case, the shaft 29 and adjusting shaft 28 will be .connected to their

related parts

34 and 38 in the same adjusted relation as when the cover was removed. The pocket 32 is provided with a cover 50 to prevent leakage of fluid from the meter.

Detachably mounted upon the lower end of the crank case is the valve flange 5| having a separate port 52 communicating with each of the cylinder ports I2 (Fig. 1) .and forms with the crank case an enclosed valve cavity 53. The valve flange 5| is mounted upon the crankcase by screw means 54 and is sealed to the crank case by a suitable gasket 55. A valve plate 56 is mounted upon the ange 5| by screws 51, and is provided with valve ports 58 which register with ports 52 of the flange. The three ports 58 which extend through the valve plate 56, are concentrically arranged (Figs. 1 and 4) to be opened and closed in timed relation with the operation 0f the meter by a rotating valve 59 flexibly and adjustably connected to the lower end of the crankshaft. The valve 59 includes an inlet port 6 0 and a discharge port 6| which, during the rotation of the valve progressively open and close the valve ports 58 in timed relation with the operation of the meter, and thereby alternately connect each cylinder with the pressure uid contained within the crank case with the discharge passage 62 formed concentrically through the valve plate 56 and valve flange 5| (Fig. 1). In order to concentrically maintain the valve 59 with relation to the ports formed through the valve plate, this plate is provided with a centering member 63 having diagonally arranged upwardly extending arms meeting at a common center to support a valve centering cone 64. The valve in turn is provided with a conical depression 65 cooperating with the centering cone 64 to maintain the valve central. This centering feature also assists in supporting a portion of the `un` balanced load of the valve. As will be observed in Fig. 1, the portion of the valve which carries the conical depression 65, is made adjustable with relation to the main valve body, whereby the valve may be arranged to seat in fluid-tight relation with the valve plate 56, and yet to bear` upon the centering cone 64. I'he cone 64 and portion 65 may be made of steel and hardened to resist wear. Spring means 66 is provided between the valve and the adjacent end of the crank shaft to yieldingly maintain these parts in operative relation.

It is preferable to provide an adjustable coupling between the crankshaft and valve 59. Connected to the portion 25 of the main crankshaft by means of a universal 61, is the short valve driving shaft 68 carrying at its lower end a flange 69. The flange 69 has a plurality of concentric slots 10 through `which extend the screws 1| for clamping the driving disc 12 to the flange 69 (Fig. 1). It is preferable to clamp between the flange and driving discs a flexible sealing diaphragm 13 having its outer periphery suitably connected to the upper portion of the valve 59. Projecting downwardly from the driving idiscs.

vses

. common form of connecting rod 82.

bearing 8I is freely journalled upon the eccentric portion of the crankshaft and to-which each of the connecting rods is pivotally connected. This is rendered possible due to the pressure of the inowing liquid acting upon the inner surfaces of the pistons, tending to force them outwardly,

thereby maintaining the connecting rods and l master bearing in proper operative relation. The rear end of each of the pistons is provided with a cup leather 84 having a coil spring 85 acting' to maintain the flange portion and cup leather in sealing relation to the cylinder wall. A suitable plate 86 and screws 81 areprovided for,

clamping the cup leather to the rear surface of the piston. 'I'his structure includes one of the important features of this invention in that it permits a ready removal of a worn cup leather and a replacement of a new one in place thereof. 'Ihis operation requires only the removing of the cylinder head, and secondly, the removal of plate 6I and screws B'I, whereupon the worn cup leather may be removed andv a new one mounted upon the piston. To make this change it is not neces-` sary to disturb any of the other operating features or elements of themachine.

In the operation of the `machine the uid to be metered is supplied to the device under substantially 20 lb. pressure, and acts to drive the meter in the manner of an engine. During the instroke of each piston, the pressure fluid flows into the cylinder in back of the piston, which `is permitted by means of valve 59, and during the return stroke of each piston the valve will have turned to connect the port of the discharging piston with the discharge passage 62 which, in turn connects with the main discharge passage 90 formed in the outlet elbow or casing 9 I.

In some installations, it is preferable to provide a check valve inthe discharge passage.' As illustrated in Figs. 1 and 3, the check valve is indicated at 92 and is of more or less standard construction. TheA meter of this invention includes several inherent features such as the com- Amunication of the ports I2 with the lower portion The master of fluid, and when worn, this adjustment may be changed to compensate for the wear which has taken place.

In Fig. 6 there is illustrated a somewhat modified form of adjustable crankshaft, which includes `forming the crank pin |22 integral with the crank arm I2I, and journally mounting the eccentric bearing surface |23 upon the crank pin and connecting the adjusting gear` IZB directly to the eccentric bearing surface I23. In

all other respects the crankshaft may be identicall to that shown in the other figures of the drawings.

No claim is made herein to the connecting rod arrangement as the same forms the subject matter of my divisional application, `Serial 271,215, filed May l, 1939.

Having fully described the invention, it is to be understood that it is not to be limited to the details herein set forth, but the invention is of the full scope of the appended claims.

I claim:

1. In an adjustable throw crank shaft, a tubular main shaft journaled for rotation, a crank arm carriedby one end of said shaft, a crank pin carried by the free end of said crank and having an eccentric bearing surface, an adjusting shaft extending through the bore of said main shaft, gear means interconnecting said adjusting shaft and eccentric surface, a locking disc carried by the main shaft having a predetermined number of locking holes, a second locking disc carried by said adjusting shaft in locking relation to said main shaft locking disc and having a predetermined number of locking holes, and means for locking the two discs together by means of said disc holes.

2. In an adjustable throw crank shaft, a tubular main shaft journaled for rotation, a crank arm carried by one end of said shaft, a crank pin carried by the free end of said crank arm,

an eccentric bearing journaled upon said pin, an adjusting shaft extending through the main shaft, gear means interconnecting said adjusting shaft and said eccentric bearing, a locking disc carried by said tubular shaft, a cooperating locking disc carried by. said adjusting shaft andmeans for locking said discs together. Y

3. In an adjustable throw crank shaft, a main shaft journaled `for rotation having an offset crank pin, an eccentric bearing journaled upon said pin, an adjusting shaft carried. by said main shaft, gear means interconnecting said eccentric bushing and said adjusting shaft, a locking disc carried on the outboardend of said crank shaft having a series of equally spaced adjusting holes,

ROSS EUGENE RISSER, JR.